Lucy and Lily 【空】 in the room.They 【空】 a nice room.

are,have 再问： He has a pencil case。变为复数句 We have three dictionaries。对three dictionaries提问 再答： They have pencil cases。 What do you have?再问： He has a pencil case。变为复数句 【空】【空】【空】pencil【空】 再答： They have many pencil cases。